In this paper, a soft switched high frequency ac link converter is studied as an alternative for dc link converters. The proposed configuration can overcome the disadvantages of dc link converter and offer an efficient, light weight, reliable converter with unity power factor and low current total harmonic distortion (THD). It employs 12 bi-directional switches interfacing with a partially resonating ac link consisting of an inductor and a small capacitor in parallel. The capacitor produces soft turn-off in all operating conditions, and control method guarantees zero voltage turn-on of the switches. Having close to zero switching power losses, this converter is capable of operating at high frequencies. This will result in smaller link inductor and filter elements. These characteristics make this converter an outstanding alternative for dc link converter. In this paper, the performance of the proposed converter along with a number of applications will be evaluated.
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